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SubjectRe: linux-next: build failure after merge of the device-mapper tree
On Fri, May 22 2015 at  8:49am -0400,
Mike Snitzer <snitzer@redhat.com> wrote:

> On Thu, May 21 2015 at 11:27pm -0400,
> Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> > Hi all,
> >
> > After merging the device-mapper tree, today's linux-next build (powerpc
> > ppc64_defconfig) failed like this:
> >
> > block/bio.c:310:20: error: redefinition of 'bio_inc_remaining'
> > static inline void bio_inc_remaining(struct bio *bio)
> > ^
> > In file included from block/bio.c:20:0:
> > include/linux/bio.h:664:20: note: previous definition of 'bio_inc_remaining' was here
> > static inline void bio_inc_remaining(struct bio *bio)
> > ^
> >
> > Caused by commit d61b82161c5a ("block: remove management of
> > bi_remaining when restoring original bi_end_io").
> >
> > OK, this is a bad automatic merge caused by the fact that the block
> > tree and the device-mapper tree both contain the same set fo patches as
> > different commits.
> >
> > Commit c4cf5261f8bf from the block tree is the same as commit
> > 8395711c4f90 from the device-mapper tree and both add
> > bio_inc_remaining() to include/linux/bio.h. The above commit in the
> > device-mapper tree removes it from there, but the merge decided to keep
> > it.
> >
> > That shared patch above is part of a series of 14 patches that are
> > identical patches but different commits and are causing quite a few
> > conflicts. It looks like those patches were rebased onto v4.10rc3 as
> > the base for the device-mapper tree. A better idea would have been to
> > start with v4.1rc3 (if that is necessary) and merge commit 5b3f341f098d
> > ("blk-mq: make plug work for mutiple disks and queues") from the block
> > tree - assuming that Jens will guarantee not to rebase that part of his
> > tree.
> >
> > Please clean this mess up.
>
> Will do.

I've fixed linux-dm's for-next to be properly based on linux-block's
for-4.2/core -- I also resent Jens three block patches for 4.2 that
motivated me to rebase ontop of block to begin with.


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